Furnace.



H. A. POPPENHUSBN;

FURNACE.

APPLICATION I'LL-ED 001224.1910.

Patented 0017211914;

a sums-5min 1.

H. A. POPPENHUSEN.

FURNACE.

APPLICATION FILED 00124, 1am.

Patented Oct. 27, 1914"" H. A. POPPENHUSEN.

FURNACE.

APPLICATION FILED 001221, 1910.

1,114,803. Patented Oct. 27, 1914.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFTCE.

HERMAN A. POPPENHUSEN, OF EVANSTON. ILLINOIS.

FURNACE.

Specification of Letters Patent.

Application filed October 24-. 1910.

Patented Oct. 27, 1914.

Serial No. 588.588.

l l l Furnaces; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the acof this specification.

This invention relates to a furnace provided with an endless traveling grate by means of which the fuel fed to the furnace which are spaced apart transversely. Between said longitudinal rows are located a plurality of longitudinally extendingholow boxes or conduits 24. In the example illustrated in the drawings there are five longitudinal rows of plates 20 and four boxes or conduits 24'. Boxes or conduits 24. Q-l. which are half the cross-sectional 1 area of the boxes 24. are located at each companying drawings, and to the letters of i reference marked thereon. which form a part 1S continually advanced or moved rear-1 wardly in a horizontally disposed layer along or through the furnace during the progress of combustion. and particularly to certain novel features of construction by means of which the air required for com- The invention consists of the matters here-- inafter described and more particularly pointed out. in the appended claims.

In the drawing. :--Figure l is a longitudinal vertical section through a furnace providcd with a traveling grate and having my improved construction for supplying air t the grate. through Fig. l on the line 2--'2 thereof. Fig. 3 is a transverse section through Fig. 1 on the line 3 3 thereof. Fig. is a front elevation of the parts shown in Fig. 1.

In the drawings 10 indicates the upright side walls of the furnace; 11. the rear wall; 12, an endless traveling grate supported on sprocket wheels 13, 1.4., which are carried on a truck 15; and 16, truck wheels. which roll on tracks 17.

18 is the hopper.

The chain grate is made up of a plurality of plates 20 arranged in parallel. transverse rows, each plate having a downwardly projecting lug 20. which is Inadeintegral with a link bar 22 arranged parallel to the plate. One end of each link bar is bifurcated as shown at 22 to receive the end of the link bar of the next succeeding plate. The ends of said link bars are provided with apertures to receive transverse rods 21 on which they are held in proper transverse spaced relation by spacing tubes 23. The plates 20 are thus arranged. in longitudinal rows Fig. is a transverse tt'lltlll inclined top section 24. bustion is furnished to the fuel on the grate.

side of the grate adjacent the outer edges of the outer rows of plates 2* as plainly to be seen in Fig. 2. The boxes 24 have upright sides 24*. 24, a horizontal bottom 94 and inclined top wall sections A, M which come together in the vertical plane of the longitudinal central axis of the box in the manner of a gable. The top wall sec tions 2%. 2-1 are each pro ided with openings or ports 24 The boxes 2 i 24 at each side f the chain grate have but. the one The. boxes 24 and 24' preferably extend the length of the chain grate and are. connected at their forward ends to a ilflllf \'(l t hollow box or conduit 23 which is supported in any convenient manner on the truck frame 15. aid box 25 has a closed end 2 and is connected at, it th nd t a tube or pipe 26 through which i supplied a bla.--t of air from a fan r other suitable means (not shown in the drawings,. The several l)t) 24 project at. their rear end beyond the grate and are. supported within lllttll l( socket supporting plates 27 which are mounted in the rear all 11 of the furnace. The bottom walls 27 of the s ckets, Q? in said plates are preferably inclined dmvnwardly and forwardly so as to guide the rear ends of the boxes 24 into said sockets when the grate is pushed back into the furnace after it has been withdrawn for any purpose. 24", 24? terminate short of the rear end of the grate and are supported on lugs 28 made rigid with the side frame members 15 of the truck frame 1;) (See Fig.

The parts of the grate and of the boxes are so constructed and arranged with reference to each other that the lower edges of the inclined top sections 24 of the boxes are on a level with the top of the plate 20 so that air driven through the ports or openings 2;? will strike the fuel supported on said plates near the bottom layer thereof.

Thcpperation of the apparatus is ap- The side boxes parent from this description. Air under pressure is driven through the boxes 21, 24- and escaping through the through the fuel from be ow and supports combustion.

To control the supply of air escaping from the boxes I preferably provide pistons or plunger-s 99 which are slidablv mounted in said boxes. Said pistons are. connected to rods 2% which extend lengthwise through the boxes and project through the front wall of the tranmerse box 135 Where they are connected to a crossbar 29 llv moving these rods tor-Ward. portions of the box at the rear niav be cut oil and the supply of air may thus be controlled. liy the employment ot the type of valve construction described and shown. the valve when op rated to.bring it into any position between iull vopeu and fully closed. does not diminish or reduce the .supplv of air to the entire conduit. as would be the case in the operation of a valve of the swinging. compression, or other tvoe located at the mouth of the conduit. or in the air supplv pipe. My valve merely cuts oil the air from that portion or section of the conduit in the rear oi" the valve. While the portimis or sections of the conduit in 'ront of the valve. still receive their full sup n of air blast. With my type of valve construction, the. blast of air mav he cut oil from a certain section of the fuel on the grate. while the remaining section is receiving a blast of air to assist combustion. This is desirable, when the fire at the rear oi the grate is burning properly and no more air, except what is supplied bv natural d aft is needed at this point. Other advantages will be sell evident to those skilled in the art to which mv invention applies.

1' claim as my invention:-

l. in a furnace. the combination of an endless traveling grate embracing flat plates arranged in longitudinal ows spaced apart transversely. a longitudinally extending hollow conduit'having a bottom Wall, side Walls and a top Wall, said conduit being located between said rows of plates with its bottom Wall located below the level of all portions of said plates and its side wall spaced laterallv from and out of contact with the lateral edges of said plates; the top wall of said level of said plates and provided with at least one port or aperture, means for supporting said conduit in fixed relation to the traveling plates, and means for supplying a blast of air to said conduit.

2. In a furnace, the combination of an endless traveling grate embracing flat plates arranged in longitudinal rows spaced apart transversely. a. plurality of longitudinally extending conduits, each having a bottom wall, side walls and a gabled top wall comports 21* passes:

conduit being above the l l l l prising inclined sections, said conduits being located between said rows of flat plates with their bottom Walls located below the level of all portions of said plates and the side walls thereof laterally spaced from and out ol' contact with the lateral edges of adla ent plates; the inclined sections of the top wall of each conduit projecting above the level of said plates and being provided with ports, said conduits being closed at their rear ends and connected at their forward ends with a. transversely extending conduit. the latter being connected with a source of air blast for supplying a blast of air to the conduits located between said rows of plates, and means for supporting said conduits in fixed relation With reference to said traveling grate.

3. In a furnace. in combination, an endless traveling chain grate embracing longitudinal rows of plates spaced apart transversely. a plurality of longitudinally extending boxes located between said longitudinal rows of plates. said boxes having side and bottom Walls. and a. gabled top wall comprising inclined sections. said inclined sections of the top Wall having ports, said boxes being closed at their rear ends and being connected at their forward ends to a transversely extending box. said transverselv extending box being closed at one end and being connected at its other end to a source of air blast. means for supporting said boxes in fixed relation with refercure to said traveling grate. and means for controlling said port openings embracing a piston member adapted to be reciprocated in said boxes, and means for reciprocating said pistons.

4. In a furnace, the combination of an endless traveling grate embracing longitudinal rows of plates spaced apart transverselv, a longitudinally extending hollow conduit. having bottom. side and top Walls. said conduit being located between rows of plates. the top Wall of said conduit being provided with a plurality of ports or apertures. means for supporting said conduits in fixed relation to said traveling grate, means for supplying an air blast to said conduit. and means for controlling the discharge of air through one or more of said ports.

In a furnace, the combination of an endless traveling grate embodying flat plates arranged in longitudinal rows and spaced apart transversely, a plurality of longitudinally extending conduits, each having a bottom wall, side walls and a gabled top wall and provided with a plurality of ports in said top Wall. said conduits being located between said rows of plates. and connected at their forward ends with a transversely extending conduit. the latter being connected with a source of air said alumnus blast for supplying air to said conduits, means for supporting said conduits in fixed relation with reference to said traveling grate, and means for controlling the dis charge of air through one or more of said ports.

In testimony, that I, claim the foregoing as my invention I affix my signature in the presence of two witnesses, this 19th day of Oct. D. 1910.

HERMAN A. POPPENHUSEN. itnesscs GEORGE R, VVILKINS, \VAL J. MCMAHON. 

